package com.itheima.springbootcondition.condition;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.type.AnnotatedTypeMetadata;

import java.util.Map;


public class ClassCondition implements Condition {

    /**
     *
     * @param conditionContext 上下文对象,用于获取环境,IOC容器,Classloader对象
     * @param annotatedTypeMetadata 注解的原对象,可以用于获取注解定义的属性值
     * @return
     */

    @Override
    public boolean matches(ConditionContext conditionContext, AnnotatedTypeMetadata annotatedTypeMetadata) {

        //1.需求导入jedis坐标后创建Bean
        //思路:判断redis.clients.jedis.Jedis文件是否存在
        boolean flag = true;
        try {
            Class<?> aClass = Class.forName("redis.clients.jedis.Jedis");
        } catch (ClassNotFoundException e) {
            flag = false;
        }
        return flag;

        //2.需求导入通过注解属性值value指定坐标后创建Bean
        //思路:
        //获取注解属性值 value
       /* Map<String, Object> map = annotatedTypeMetadata.getAnnotationAttributes(ConditionalOnClass.class.getName());
        //System.out.println(map);
        String[] value = (String[]) map.get("value");

        boolean flag = true;
        try {
            for (String classname : value) {
                Class<?> aClass = Class.forName(classname);
            }
        } catch (ClassNotFoundException e) {
            flag = false;
        }
        return flag;*/
    }
}
